Engineering Design

Engineering Design George E. Dieter Mc Graw Hill

Product Design Process Definition of Design: Design establishes and defines solutions to and pertinent structures for problems not solved before, or new solutions to problems which have previously been solved in a different way The ability to design is both a science and an art

The four C’s of Design Creativity: Requires the creation of something that has not existed before or not existed in the designers mind before Complexity: Requires decisions on many variables and parameters Choice: Requires making choices between many possible solutions at all levels, from basic concepts to smallest detail Compromise: Requires balancing multiple and sometimes conflicting requirements

Static vs. Dynamic Products Static: Changes in design concept take place over a long period of time; rather incremental changes occur at the subsystem and component levels Automobiles, Refrigerators, Dishwashers Dynamic: Change the basic design concept fairly frequently as the underlying technology changes Computers, Telecommunications, Software

The design Process General Information Specific Information Design Process Outcome NO YES Evaluate

Scientific vs. Design Method Existing Knowledge State of the Art Scientific Curiosity Identification of need Hypothesis Conceptualization Logical Analysis Feasibility Analysis Proof Production Scientific Method Design Method

Problem Solving Methodology Definition of the Problem Gathering of Information Generation of Alternative Solutions Evaluation of Alternatives Communication of the Results

Considerations of good Design Design Requirements Life Cycle Issues Regulatory and Social Issues

I. Conceptual Design Define Problem: Problem Statement Benchmarking Quality Function Deployment (QFD) Product Design Specification (PDS)

I. Conceptual Design Gather Information: Internet Patents Trade Literature

I. Conceptual Design Concept Generation: Brainstorming Functional Decomposition Morphological Chart

I. Conceptual Design Evaluation of Concepts: Pugh Concept Selection Decision Matrix

II. Embodiment Design Product Architecture: Arrangement of Physical Elements to carry out Function

II. Embodiment Design Configuration Design: Preliminary Selection of Parts and Materials Modeling and Sizing of Parts

II. Embodiment Design Parametric Design: Robust Design Tolerances Final Dimensions Design for Manufacturability (DFM)

III. Detail Design Detail Design: Detailed Drawings Detailed Specification

IV. Planning for Manufacture Designing Specific Tools and Fixtures Specifying the Production Plant and Production Lines Planning the Work Schedule and Inventory Control Planning the Quality Assurance System Establishing the Standard Time and Labor Costs Establishing the System Information Flow

V. Planning for Distribution Shipping Package Documentation Shelf Life Warehouses

VI. Planning for Use Maintenance Reliability Product Safety Convenience in Use (Human Factors) Aesthetic Appeal Economy of Operation Duration of Service

VII. Planning for Retirement Useful Life Deterioration Technical Obsolescence Fashion or Taste Environmental Issues Industrial Ecology Green Design RFI Power Consumption

Marketing Marketing Creates and Manages the company’s Relationship with its Customers Marketing Translates Customer Needs into Product Requirements Marketing Defines Support Services Marketing Studies How Customers Make Buying Decisions Marketing and Sales are Different

Marketing Early Adopters Mainstream Adopters Laggards

Market Research Define the Market Segment Identify the Early Adopters Identify Competitive Products Establish the Market Size ($) Determine the Breadth of Product Line Determine the Product Price / Volume Relationship Establish the Customer Needs and Wants

Engineering Design